Carburetor



R. WENDELKEN. CARBURETOR.

APPLICATION man AuGAz. 191s.

1,41 3,440. Patented Api.' 1s, .1922.

4 SHEETS--SHEET 2.

1li Itis* i BY MK/M ATTORNEY.v

R., WENDELKEN.

CARBURETOR.

APPLICATIONHLED AUG. 12.4918.

1922; 4 snEETs-snes a.

Patented Apr. 18,

. a. WENDELKEI'Q.v

CARBURETOR APPLICATION FILED AUG. I2, I9'l8.

` Patented Apr. 1s, 1922.

V INVENTOR. A I @'cMdZzdfZ/em ATTORNEY.

' n icHARnw'nNniiLKEN, or NEW venir] it. Y., Assienon;

T @ZZ whom it may concern; f

" iaisatae.

BY Mnsivn iiss'ieiviiiiiii'rs' To JULiUs WINTER, or NEW YORK, ngi.

A Be itknown that l, RICHARD WENDELKEN,

a citizen ofthe United States,`resicling at New York, in the county of Bronx and State of New York, have invented new anduseful- Improvements inl Carburetors, of which the` following is a specification.

YThis invention relates to improvements in carburetors for internal vc oiiibustion engines, and has 'for its objectsto provide improvementsr in carburetors of the type in4 which;

the liquidvhydrocarb'on is held in suspension by :absorbent elements, wherebyv such absorbent elements are operatively connected Awith the main air valve and so arranged as yto increase or decreasethe quantity of gasoline supplied accordance withthe increase. or decrease in the quantity of air and in i vwhich the absorbent elements may be readily renewed or replaced. The invention further contemplates improvements in the carburetor as an entirety withthe objects of securing v`accurate proportioning of the constitu- 4ents of the mixture under all conditions of running, of simplicity, compactness andVY .ready accessibility of organization yand of 'providing a' structure wherein the casing parts are particularly adapted for manufac- A lture from aV phenolicV condensationV product,

which substance, for reasons yof manufacturing facility, the smoothness of the surfaces which are exposed to theliquid hydrocarbon.

andthe fact that such material wiil not proinote condensation o f the, vapor of the hy drocarbons is to be preferredfoi'such use.V

Further objects are to' provide in a structure of they typejset forth af main air valve,. a fuel valve, and an auxiliary air valve andA valve organization which will be simplein construction, certain and reliable in operation andrmost sensitive to control- The features of the invention are suscepltible' ofv various structural expressions and4 may be embodied in carburetors of various forms, certain of which are illustrated,' by lway of example, in the accompanying drawings,vr wherein improved carburetor.

Figure l is a perspective view ofthe main air valve and actuating means.`

Figure 3 is a section taken on lilies 3-*3 of f The body is formed or providedA with a Y Figure l.'

^ canisuiasmoa Specification ofLetterS'Patent. Patented APL 1851922. applicationaieaaugust 12v, 191e.A serial No. 249,534.

.Figure 4 is aV plan viewf Figure 5' is a section taken onlines 55 ofv Figure l. '-1' Figure 6 is aside elevation, `partly insec-V tion, .showing a lmodifiedforni of connection with the intake manifold andengine.

Figure Z isa detail VYplanand'alsoshows a ,vertical sectional view ofthe mainy airvalve. Figure 81 is a detail plan view ofthe fuel valve and also shows sections taken through the valve at channel 22V and atone of thev 'slots' 53, respectively.v i. Y j

Figure 9 is a vertical section through al modified form of the carburetor.`-

Figure lOlis a top plan view and F igures ll Aand .12 are end "elevations, respectively, of the form'shownin'Figui-e 9. y

VFigure 13 is afplan view and Figureslt and l5 are front elevations of an alternative form of mainor fuel valve shown in connecfv tion syiith anembodiinent illustrated inFigure v Y Figure lli-is a detail showingthealternative mounting of. the absorbent strips on the main air valve. f

Similar characters`-offreference designate 'i g have an attachmentV flange s 3 .formed ,integral therewithv orit may as shown in Figure 6, be adapted forconnection to an angular couplingfwhich is provided with `an .at-

tachmentflange 5. :In the lat-tercase 4the part 2 formedr along its lupper side with van annular boss 6, internally threaded,`a s at 7, and havingan internal` annular shoulder 8 andthe coupling 4 has anvannular neck 9 which lits within the bbss Gand-is securely .metal bushings, cast therein,for .cooperation like as may be required.

retained therein b'y'a split'clamping nut 10 Y Figure l is a verticalfsection through my* with such arious bolts, screwstems orfthe fhas a marginal lip 14a to overlap and close the joint with the other.

The upper part 2 is fashioned, internally,

' to provide a mixing chamber 15 located above the plate 14 and a valve chamber 16 located above the air chamber 12 and in Y open communication Vwith the chamber 15 by a passage 17. The air chamber 12 com` municates with the mixing chamber 15 by the passage 17 and its communication is controlled by the fuel valve 18 which projects across the upper end of the air chamber and as it is raised or lowered increases or decreases the effective area of the passage 17 as a means of communication between the air chamber and the mixing chamber. The valve 18 is of the ap7 type, being formed as a substantially flat plate whose outlines, preferably rectangular, conforms to that of the chamber 16. Said valve is suitably mounted upon or secured to a transverse rock shaft 19 having end bearings 2O which are set in mating Arecesses of the casing parts 1 and 2.

At one end the shaft 19 carries an external arm 21 adapted for connection to the linkage or mechanism by which the movements of the valve 18 are effected and controlled. When fully closed, as shown in Figure 1, the free edge of the valve 18 rests upon the upper edge of the partition 11; but in, order that the communication of the air chamber 12 and the mixing chamber 15 may not be coms pletely interrupted in the fully closed position of the valve, the latter has in its under face a narrow and shallow channel 22 by which sufficient air will be passed to the mixing chamber to enable the engine to run at low or throttling speed.

The chamber 12 is provided in its lower portion with air inlet openings 12 preferably located at opposite sides of the casing and to which aconducting pipe (not shown) for supplying preheated air may be connected if desired, the preheating ofthe air being effected by the exhaust gases or in any other suitable manner, all as well known in the art. rIhe supply of air from the chamber 12 to the mixing `chamber l1 5 .is controlled by a main air valve 23 which is preferably of the flap type and is pivotally movable about a horizontal axis, being raised by the suction of the engine or positively as hereinafter described to increase the amount of air supplied or lowered by spring pressure to decrease it. The valve 23 conforms in outline to the chamber 12 and is preferably rectangular. When in fully closed position the free edge of the valve 23 rests upon ledges 24 provided at the side of the air chamber opposite the pivot of the valve and between which there is a somewhat narrow space 25 affording constant communication between the lower or inlet portion of the air chamber and its upper portion, whereby in the fully closed position of the valve 23, suicient air will be admitted to enable the engine to runat low or throttling speed, such air passing into the upper portion of .the chamber 12 and thence through the -channel 22 of the valve 18 and the passage 17 to the mixing chamber 15.

In the construction preferred the pivotal axis of the valve 23 is located adjacent the Y partition 11 and the valve is spring urged toward its closed position, the spring, as 26, `being housed in a chamber 27 of said partition and acting at its upper end on a tail piece 28 which projects at anv angle beyond the pivot of the valve through a suitablel opening 29 formed in the adjacentl wallet the chamber 27. For its pivotal mounting the valve 23 may be provided with lend trunnions 30 (Figure 7 fitting in suitable bearings secured in the sides ofthe chamber 12. In order that the pressure with which the spring 2G acts on the valve may be regulated, a screw stem 32 against which the lower end of the spring seats is threaded in the chamber 27, said screw stem having an externally located head 37 by which it may be turned. A suitable spring urged detent 33 may be provided for holding the screw stem against turning and in the construction preferred this detent has the form of a bolt which is slidable in an external boss or socket 34 formed upon the body 1, the spring 35 which acts on said bolt being housed in said socket. The bolt 33 Vhas a suitably formed toothl 36 for engagement in any one of the notches arranged at close intervals along t-he circuinference of the head 37. Said bolt may also be provided with suitable calibrations 38 readable in connection with the edge of the socket 34 for the purpose of indicating the degree of compression of the spring 26.

In the preferred construction the valve 23 is positively operated in correlation to the main valve 18 throughout a higher range of` "extent from the freeedgeof the valve`23;

It follows that the valve lS'may be operated through an initial range during which the Ynose 40 fwill not,r1n any case, engage the valve 23 and the latter is therefore free to play, in response tolsuction variations, within the limit of such initial range of the valve A18. Vhen thevalve 18 is movedv beyond the said `initial rangey the nose 40. Williengage the valve 23 andl positively raise the 4latter |`further movement of cases when the normal maximum amount of air delivered froml the chamber 12 is .insufficient the chamber 16 has in its upper wall an auxiliary' air openingj'41-which :is normally closed by a valve 42 held'seated by aspring 43. f The valve 42 is preferably of conical formfand projects through the opening 41 into the chamber 16 whereby'it may be engaged and opened by thevvalve 18 when the latter is moved beyond its normal fully open position. The chamber 16 :is formed whereby av clearance lof channel 44 is afforded between the free edge ofthe valve 18 and the wall whichsaid edge conf fronts when said valve is positioned to open the valve 42. The clearance 44 communicates with the opening 41 and ,when the valve 42 is opened provides a passage leadingy to the passage 17 `and through which the auxiliary air admitted by said opening mayY flow to the mixing chamber 15. Instead of a single opening 41 and valve 42 as shown in Figures land 2 two or more of said openings and valves may beY provided, two being Yshown in the embodiment of Y"Figures 1() The air which flows Ainto the, chamber 16 takes upA the gasoline of the mixture, in the y formof vapor, from absorbent elements v45 1 which vare exposed to such air in the passagev 17. Each absorbent element comprises a Vbody of felt or equivalent material which is submerged in the liquid fuel in the chamber 13 and is mounted upon a exible wire 47. Any desired number and grouping of the absorbent elementslmay be employed and their bodies 46 may have any desired pro# vvportions and cross sectional form Tand may be fixed to the wiresl 47' in any suitable maiiexposed in greater or less degree to the airf ner.

l The absorbent elements are preferably located closelyv adjacent the partition -11y and are loperated by the valve 18, that is to say they are moved across the passage 17-and flowing through said passage, accordingly as the valve 18 may 'beraised Vor lowered', their movement beingv through suitable openings 48, in the plate 14.

dIn orderV that the'absorbent elements may b'e Arais'edg'their wires 47 are suitably con-` nected at their upper ends to the valve 113v andinV order that said elements iriaybellow y ered their lower ends lare connected tocross heads 49 which are urged'downward by springs 50 acting between them and: the vplate -ny suitable form ofY connection''mayV be Vprovided between Ythewires 47 andthe valve 18. fF or example, as `shown in'` Figures Y vof the f valve and through whchthe wires are fitted. Or, alternatively, the connections with eyes 53a at their upper ends vand the valve .18 is formed along vitsfi'ee edge with "may have the form shown `in Figures 14-17, 'according to whichA the wires 47 are formed alining beads v54 havingspaces 55 between the-rny in *whichV the eyes are disposed, the 1 connection being similarto a knuckle hinge joint and `being completed by a hinge pin '56 l iitted through the eyes and through the beads. -L

' In the embodimentv of Figures 1 to .8 the` elements -45 are provided in two groups Yof two each, each Vpair being connectedftoa cross head 49 and the latter 'being mounted 1 on a verticalstem 57 which provides a guideand is also utilized asia mountingforfthe"v spring 50 by which the cross head is urged downward.V In such embodiment the stems 57 may beutilizedffor the connection of the parts 1 and 2 and for this purpose they are extended through openings inthe .plate 14 and have their lower Vends anchored in the body 1 and ftheir upperend's threaded: andv engaged with nuts 58 seating in recessesj'in` the upper'face ofthe .part' 2...; .The parts 1 lfY desired,fand as shown,v and preferred,

-- and 2-are also connected by fastenings 59.1 60, the-,former beiiig:.utiliz`ed to secure Vthe Y ,105, 'Spring'- 43 whichcarries the valve 42;

theabsorbent elements may, have the upv per terminals of their.' felt bodies at Vdifferent yelevations whereby-only the longer of said `elements will be'exposedfor an: initial 'range of lower Vspeeds and all ofthe elements will be exposed,in Vgreater-or.lessdegiee in ac-V cordance with the extentvofopening Yofthe valve 18 forthe range of-.higher speeds It yis to be'noted that the longestof theabiis,VVV

sorbentelements will 'have their upper ends substantially flush with the u'pperface ofthe plate 14,. in the closed positionfof :the valve 18,whereby the air, pilSSd by the Channel" 22, .will take up `sufficient fuel yto maintain thel operation of the engine .at low or throttling speed'. Y Y' In priming the mainair valve 23 is held closed by a horizontallymovable shutter 61" whose engaging end is `normally located above the adjacent ledge-24 and clear of the i free edge of said valve: The shutterv Gleis preferably V mounted j on a vertical. lpivot" 62 and projects through a slot in thewallfof the chamber 12, its pivotal end being connected to an operating arm 63 which is acted on by a spring G11 to vhold said shutter in its normal position. 'Vhen the ,arm 63 is moved inward against the pressure of the spring 64 the shutter 61 is movedto overlie the valve 23, adjacent its free edge, thereby positively holding said valve closed.

Any suitable form of float and feed mechanism may be used in connection with the fuel Y'chamber 13, 4the particular :type illustrated forming the subject-matter of va concuirent application.

In the modified :construction shown in Figures 10 to 13, the main air valve, as 23, is opera-ted independently of the fuel valve 18 and is of the butterfly type, its shaft having an external operating arm 23h. A further departure consists in the `connection of all the absorbent elements to a single cross bar 49a Whose ends operate in grooves LSD vformed by the partition 11 a-nd by flan-ges 49C parallel to said partition. r1`he casing parts l and -2 are substantially rectangular in construction and are connected at their corners by fastening screws. The operations of the main valve 23a, the absorbent elements 45 and the auxiliary air valves 42 are the same as in the embodiment of Figures l and 1.

1t will be understood that the features of the invention and the forni and arrangement `of the carburetor casing parts are susceptible of various modifications Within the scope of the appended claims.

Having fully described my invention, I

1. A carburetor comprising a body having a fuel chamber, an air chamber, an air inlet passage to said chamber, and a mixing chamber adapted to communicate with the air chamber and with the intake manifold of the motor, a pivoted valve controlling the communication of the air and the mixing chamber, fuel feeding elements yieldably mounted in the fuel chamber and connected to the free end of said valve, and means for manually operating said valve to increase and decrease the degree of communication of the air chamber and the mixing chamber whereby said elements are exposed in greater or less degree to the air passing to the mixing chamber.

2. A carburetor comprising a body having a fuel chamber, an air chamber, an air inlet passage to said chamber, a mixing chamber adapted to communicate with the air chamber and with the intake manifold of a motor, a. pivoted valve controlling the communication of the air chamber and the mixing chamber, and fuel feeding elements of different lengths yieldably mounted in the fuel chamber and connected to the free edge of said valve whereby as the latter is moved to increase or decrease the degree of communication of the air chamber and the mixing chamber said elements vare exposed in greater or less degree to the air passingtov the mixing chamber, the longest of said elements being slightly exposed to the mixing chamber when said valve is in closed-position, Said valve having a channel formed therein whereby sufficient air may pass to said mixing chamber when the valve is closedto for-m a combustible mixture.

3. A carburetor comprising a body having a fuel chamber, an air chamber, an air inlet passage to said air chamber, a mixing cha-mbcr adapted to communicate with the air chamberzand with the lintake manifold `of the motor, a valve controlling the communication of the air chamber and the mixing chamber, flexible absorbent elements disposed in the fuel chamber and connected at one end to said valve `whereby as the latter is operated to increase -or decrease the degree of communication of the air' chamber and the mixing chamber, said elements are exa fuel chamber, an air chamberv and .an air -v inlet passage to said air chamber, a mixing chamber adapted .to communicate with the 4air chamber and with the intake manifold lof the motor, a pivoted valve .controlling the communication of the air chamber and the ymixing chamber, aspring pressed head movably mounted in the fuel chamber yand flexible absorbent elements comprising Wires connected to said head and to said valve and bodies of absorbent material mounted on said Wires for exposure, in greater or less degree, to the air passing to the mixing chamber, accordingly as said valve is operated to increase or decrease the degree of communication of the air chamber 4and the mixing chamber.

5. A carburetor having a casing comprising a lower part and an upper part secured on said lower part, the latter having a vertical partition dividing the casing into a fuel chamber and an airchamber having an air inlet, the upper part being formed to provi-de a mixing chamber located above the fuel chamber and adapted to communicate With the air chamber and with the intake manifold of a motor,a plate arranged between said parts and separating the fuel `chamber'from the mixing chamber, a iiexible absorbent element .yieldably mounted in the fuel chamber, the plate having an opening through which said element may project, and a movable valve arranged above the air cordingly as the valve is more or'l'ess open, lto the air passing to lthe mixing chamber.

6; A carburetor having a casing'comprie, ing a lower part vand 1an upper part secured on saidlower part,'the latter havingaverti-i ,ments comprisin :fuel and air chambers, avalve chamber'located above the -air Chamberland in com# cal partition dividing,thecasing into Va fuel chamber and anairchamber having van air inlet, the. upper part being formed tolprovide a] mixing chamber located above the fuelV chamber and adapted-to communicate with tlie"airrchamber and with the intake manifold of a motor, a plate' arranged be-v.

vtween said parts and separating theffuel chamberfrom the mixing chamber, a piv#V otedvalve controlling thecommunication of L the air chamber -and themixing chamber', ai spring pressed head slidably mountedinithe g fuel chamber vadjacent said partition and' flexible absorbent elements for `which ,said plate is providedwith openings, saidele;y

v 'wires connectedV to said head and detacha lv lconnected tosaidl'va'lve adjacent its free edge and bodies'of'abserbent material mounted on Vsaidvviresfor exposure, ingreater orl'less degree, tojthe air passing to the mixing.Lchamber,'accordingly` as said valve is opened to a greater or' less degree. j, 7. i carburetor comprising a` body ha ving a fuel chambenfamixing chamber for air'V and f uel adapted to communicate with the v intake manifold ofthe engin@l an' air cham# q berlocat'ed'belowsaid mixing chamber and at one sideof the fuel chamber, andprovided with an air inlet, a wallfseparating said munication therewithand with the mixing` chamber, a valveipivotallv'mounted in thel valve chamber with its free edge ladjacent l thc mixing chamber and.'=adapted to seat against said wall, said'valveco'ntrolling thecommunication of the air chamber and ,the

mixing chambemthe upperbody wallof the valvechamber having an auxiliary airopen-i' ing adapted to communicate' through said;

valve chamberwiththe mixing c hainber,` and a spring pressed va'lve' normallvl closingsaid Y opening and arranged for opei'ation'by engagementY with saidpivotedvalvewhen the latter is moved beyond its normalopened pofV sition.

8. A carburetor comprisinga body having a fuel chamber, a mixing chamber forair' and fuel adapted vto communicatejwith thek intake manifold of the motor, an -air chamber located below said mixing-chamber and at one side of the fuel chamber and provided with an air inlet, a vertical wall separatingV said fuel and air chambers, a valve chamber 'located above the air chamber in communicato vthe second f valve tiontherewithv andwitlithe inixing'cliam-r f ber, and a, valve pivotally mounted inthe valve chamber with its free endadjacent the mixing chambemand having al channelin vits under face through'which Vair maypass to" tli@ mixing chamber when the valvefis able the engine to `operate at' closed, vto -env lows eed.V l

l 9. i carburetor a fuel chamber, a lmixing chamber' for fuel and'airladapted" to communicate yv'vithV thef I" ber located below saidlniixing chamber Vand i intake manifold of thenilotor, anhair chamat one Vside of the fuel chamber and provided with anairinletpa'ssage located abovefthe air chamber in communication therewithv a-ndfwitli the mixing chamber, a valve pivot-3 comprising a body having vally/'mounted in the valve chamberandl-con-' trolling theljcommunication ofthe'airfcham- 1j n ber and the mixing chamber, a 'second valve?v located'in the' air chamberbelow thev `first valve and controlling the communication of' the air inlet withthe air chamber, an armvdepending from the pivot Vofjthe first valve and having an'angiilar lnose for operating! y the second valve .frombelowand a"s'p'iyiilig,i 1 Y 95Min to move the second' valve to'olosedfposition,

saidarin havinginitialfplav withgrefeiencef" Operate in-reSpilSe.

whereby theflatterjmay 'o suction"Lfvariationsfi ii'idepei'identlv lofjtheg'angular position ,ofjfjji ,i t l. ..100 "110. 'Acarbiiretor coi'rijgirisi'ng"aV body hav-f ing aif'uel4l chamber, a V,mixing chamber4 forV fuel .and air adapted to" communicatlfith the intake'manifol'dfof the iriotorfaii` "air chamber located below said`^mixingl-`cham berand Vat one side ofthe fuelfchambfer and provided'with an4 air inlet, a valve `chamberflocated abovethe" air'ehambei in communicationy therewith'nnd with `the mixingcham-A ber,.a recessed wallseparating said fuel and giio air chambers', a pair of flapfvalves, 4one of which, to control. the communication ofthe air chamber vand the lmixing chamber, Lisv located in said valve chamber with itsfree edge adjacent the mixing vchamber and adapted tos'eat againstsaid "wall," and the, other of which, to controlfthe Vco'inmuni'ca-V 'Y tion lof saidf air inlet. with the airfchamber,"

islocated lin the air'chamber with-V free edge adjacent'the side thereof whichis adopening the second valve. ll. -Acarburetor comprising a bod7 hav.

l Vjoined byfth'e pivot of the first valve-Qa springflocated within said'V recessed wall to' K Y move vthese'coi'id valve torclosed V"position, and'anarm depending from' 'the`pivotfof the' `first valve and having-anl 'angular nose foi'vvl'zv if,

ing a fuel chamber, a mixing chamber for f fuel and air adapted' to commumcate with `the intake manifold of. the motor, an air chamber located below said mixing chamber and at onevside of the fuel chamber and provided withv an air inlet, a valve chamber located above the air chamber in communication therewith and withthe mixing chamber, a va ve pivotally mounted in the valve chamber and controlling theA communication of the air chamberand the mixing chamber, a second valve located in the air chamber below the first valve and controlling the communication between said air inlet and air chamber, an arm depending from the pivot of the first valve and having an angular nose for operating the second valve from below, a spring to move the second valve to closed position, said arm having initial play with reference, to the second valve whereby the latter prior to its engagement of said, nose, may operate. in response to suction variations, and a normally disengaged shutter adapted to be movedinto engagement with the second valve for positively holding the same inclosed position for priming.

l2. A carburetor comprising a. body having a fuel chamber, a mixing chamber for fuel and air adapted to communicate with the intake manifold of a motor, an airy chainber located below said` Vmixing chamber and at one sideofu'the fuel chamber and provided with an air inleta valve chamber located above the air chamber in communication therewith and with the mixingcham-y holding the second valve closed during prim- 13.V A carburetor comprising a body having a fuel chamber, a mixing? chamber for communication with the intake manifold of a motor, an air chamber for communication with the mixing chamber and provided with an air inlet, a valve in said. air chamber to control the communication of said air inlet with said air chamber, a spring for moving said valve toy closed position, a screw stem upon which said spring `seats,` and by c which the strength of the spring may be regulated, said stem having an external head, i

anda spring pressed bolt for locking engagement with said head, said bolt being parallelA to said screw stem and provided with calibrations. by which the strength of said spring may be read.

' 14:. A carburetor comprising a. bodyl formed with Va fuel chamber, a mixing cham- Aber andan air chamber adapted to communicate with each other, a fuel valve anda pivoted main air valve for controlling thisV communication, s aid fuel vvalve havingV a channel formed therein, and a slotted shoulder formed on" the interior of the body wall` ber and an air chamber 'adapted to commu-- niciate with-'each other, a fuel valve and a pivoted main a-ir valve-for controlling this communicatiomvsaid fuel valve having a channelv formed therein, a slotted shoulder formedon the interior ofthe body wall of theair chamber, ysaid slot being vpartially covered by the free end. of said pivoted air valve when thel latter is inclosed position whereby" proper quantities'of air and fuel may be fed tosaid mixing chamber to formv a ,combusti-ble mixture therein ,when both of said valves are-in closed position, and an arm. depending from said fuel valve and passing through the slot vof saidshoulder for positively actuatingsaid air valve.

16. In a carburetor a casing provided with an air'chambeiihaving a main air inlet pas-` sage iii-communication therewith, a mixing' chamberlhaving an auxiliary air inlet passage and fuel chamber, a suction responsive air valve controlling the communication of said main air inlet passage with said air chamber, anV auxiliary air inlet valve controlling the auxiliary air inlet passage, a fuel valve controlling communication` between saidair, fuel and mixing chambers, said fuel valve being constructed to positively actuate said main air valve after an initial period of its openingv movement andy to positively actuatesaid lauxiliary air valve in the final period ofits opening'movement.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

y VPdCI-IARD WENDELKEN. llfitnesses: i i y BERNARD KOHN,

SIGMUND SPANGLET. 

